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AssigneeSchott AG
InventorsJoerg Hinrich Fechner, Franz Ott
Estimating the term…
The borosilicate glass with improved solarization-resistance has a transmittance curve within an area bounded by respective curves defined by the corresponding equations τ=1.7·(λ−277) and τ=1.6·(λ−284) in a wavelength range of 283 nm to 325 nm. This glass has a composition, in wt. % based on oxide content, of: 55-82, SiO2; 10-20, B2O3; 1-10, Al2O3; 0-5, Li2O; 0-10, Na2O; 0-10, K2O; 0-10, ΣM2O; 0-5, MgO; 0-10, CaO; 0-5, SrO; 0-15, BaO; 0-15, ΣMO; 0-3, ZrO2; 0-5, ZnO; 0-2, CeO2; 0-3, WO3; 0-2, SnO2: 0-0.1, Fe2O3; 0.05-2, MoO3; 0-5, Bi2O3; 0-1, TiO2 and 0-5, oxides of selected rare earth and Group IVB to VIIIB elements. The transmittance is adjusted by varying the MoO3 content and if necessary the TiO2 and Bi2O3 content. The glass is especially suitable for use in a weathering apparatus.
A solarization-resistant glass having a UV-cutoff with a definite or predetermined transmittance gradient, said solarization-resistant glass having a composition, in percent by weight on the basis of oxide content, comprising:
A radiating device for a weathering apparatus, said radiating device comprising:
Dependencies are inferred from the claim text.